These can be ridge vents wind turbines or the flat vents your roofer wants to install.
How do turbine roof vents work.
If you decide to add more turbine vents to your roof be sure to buy ones that are aluminum.
In addition pay attention to the maximum roof pitch that will work with the turbines.
The 14 inch diameter unit could provide a complete air change in the attic every 14 minutes at 15 mph.
A single 12 inch diameter turbine vent could provide a complete change of air in the attic space every 52 minutes if the outside breeze was just 5 mph.
These are very common to see on older roofs.
A turbine has a series of vanes that spin as wind passes through them.
How do turbine roof vents work.
Ft of vent space half dedicated for air intake in the soffits and the other half for exhaust on the roof.
Not all turbines will fit all roof pitches.
Because warm air rises up the wind powered vents with their spinning action tend to suck the air outside.
Turbine vents use a combination of wind and convection to extract stale hot air from inside your home and replace it with the cool clean air from the outside.
Most residential homes have some type of attic ventilation.
But the question our customers often ask is do they really work.
Imagine what happens if you install two or three of these simplistic turbine vents on the.
A ridge vent runs across the top of the roof s peak.
The turbines are adjustable so that the spinning part is level even though the roof is slanted.
Unlike turbines this venting style does not have any moving parts.
A turbine is installed directly on the top of a roof and uses wind power to suck hot and humid air out of the attic.
Good attic ventilation is important for preventing ice dams in the winter.
Attic must have 5 sq.